Process of making lubricating devices or grease-cups.



G. W. BOWEN. PROCESS or MAKING LUBRIGATING DEVICES 0R GRE ASE CUPS.

APPLICATION FILED JULY 11, 1913.

Patented June 9, 1914.

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INVENTOR WQTNESSES:

dgw 1 ATTORNEYS formed by the operation illustrated in big.

possess Specification oi. Letters E ement.

Applicstion filed Emily l1, ltlifii.

Patented June 9, 191%.

serial No. 778,548..

To all whom it may concern:

Be it known thot ll, Genres -W. llowrm, a citizen or the United States, end at resident of Auburn, in the county of and. Sit-etc of New York, have invented e. c thin and social Process Melting Lubricating' Devices or Grosser-Cops, oi which the following is a specification.

This invention has for its obioct- 9. process for producing a. lubricating device or grease cup and particularly a method of ottsching s sheet metal cup or heed to the stem of the device; and the invention consists in the steps hereinafter set forth and. claimed.

in describing this invention-reierence is bad to the accompanying drawings in which like chzirri'eters designate corresponding ports in all the views.

Figures 1, 2, 3 and i are vertical sectionsl views of the tools and parts being operated on, Fig. 1 illustrating the drawing and re ducing operation by which a cup Sharpe shell is termed having a reduced hexagonal base portion,

Fig. Q illiistrating the operstionloi punching l, and Figs. 3 and 4 illustrating successive reducing operations by which the barrel poi tion of the shell above the base is compressed into a. circle of less dielmeter the-tithe be so of the shell in order to clamp the shell, m the flange of the stern.

This procesis consists in taking a cup shape shell closed at one end, punchin a central hole in the closed end of the shel ,pessing a hollow stem which has a. flange at one end through the opening until'the flange rests upon the bottom or Wall around the opening,

end compressing the barrel portioii oi the shell above that in which the flange es 10-- ceted, into a circle of less diameter than the portion containing the' flange. Usually, the process also consists in reducing the base portion of the shell, that is, tbeportion adjoining the closed end and thickening the Walls of the sanie and forming said base hexagonal by drawing and pushing the shell into a reducing die by a. tool bearing on the inner face of the bottom or closed end of the shell andalso on the edge of the shell, the inner end portions of the tools or dies being hexagonal and the remaining portions oylihdrical.

In Fig. 1, 1 designates the'shell which is termed in awell. known manner by successive drawing operations from o. fiat blank,

a hole in the bottom of the shell in any Well known manner.

2 end 3 are respectively male and female die members, the member 2 having its lower end 4% formed hexagomti for fitting into the redosed hexagonal portion 5 of the die 3. In the operation shown in Fig. 1, the shell 1, which is snbstcntieily the length of the finished cup, is pieced in a female die memher 3 and the male die member or tool 2 is removed into theshell 1, the heiiagonal portion e bearing against the inner face of the bottom or closed end. 6 of the shell and drawing the some into the portion 5 of the dis 3, and. s shoulder 7 on the tool or die member 2 engsgin gthe upper edge of the shell ,1 and jecshii the shell. into the die member 3 snclmoi he; the length of the shell. and thickening tn. hexagonal p ion 8' of the shell. The thiclren'ingot the 8 is brought about by the pushing operoticn and by forming the the members 2 and 3 so that there e. greater space between. the hexagonal portions 4 and 5 thereof then between their cylindrical portions.

Theshell 9 formed by the operation shown in Fig. 1 is placed in it suitable die 10 and the hole 11 is punched therein by a tool 12. The hole punching: ope-ration may be efiected The perforated e. die 1%, Fig. 3 which has a cavity fitting the base 8 of the shell 13, the barrel. portion of the shell above the base 8 projecting out of the cavity. The stem 15 having an hexr-igonel flange 16 at its upper end of sufficient size and shape to fit, Within the hexagonal base, is passed through shell 13 is then placed in the opening 11 until said flange 16 fits within' the base 8. A reducing die 17 is then passed over or around the portion 18 of the shell 13 above the base 8 reducing the barrel portion 18 of the shell into a circle of less diameter than the base 8 and thereby forming the shell 19. The die 17 moves length Wise of the shbll from the open end thereof toward the closedend, and the shell is held from elongating by the tool 20 bearing against tbe'eclge of the open end of the shell after 7 the reducing operation has been started. As the die l7 moves toward the die 14:, the rediibing is from the open end of the shell toward the base and after the upper margin of the shell has-been reduced the tool 20 engages its upper reduced end and bears on the same during the remainder of the reducing or compressing operation, thus thickening the Wells of the shell and. preventing Well oi the base or lie elongation thereof. The shell 19 with the stem 15 attached is then placed in a die 21 similar to the die. 14: and the compressing operation repeated by tools 22' and 23 similar to the tools 17 and 20, thus firmly clamping the base of the shell onto the flange 16 of the stem. The stem is formed with a. passage 24 opening into the cup 25 and with an outl t passage 26. The stem is also elongated and threaded at its lower end for receiving a nut.

The lubricating device here shown is known commercially as a spring bolt used for connecting the leaf spring to the shackle or hearing on a side sill of a motor vehicle, or to another leaf spring.

What I claim is 1. The process of forming a lubricating device including a cup, and ,a hollow stem depending from the cup, the process consisting in the following steps :(1) forming a central opening in the bottom of a cup shaped shell, (2) passing the stem which has a flange at its end, through the opening until the flange rests on the bottom of the shell, and (3) ecmpressing the portion of the shell above the flange to clamp the flange on the bottom of the cup. substantially as and for the purpose described.

2. The process of forming a lubricating device including a cup, and a hollow stem depending from the cup, the process consisting in the following steps: (1) forming a central opening in the bottom of a cup shaped shell of substantially the length of the finished cup, (2) .assing the stem which has a flange at its'en through the opening until the flange rests on the bottom of the shell, and (3) compressing the portion of the shell above the flange to clamp the flange on the bottom of the cup, by placing the cup with the stem therein ina die which surrounds the lower portion of the cup, and forcing a reducing die of less diameter than "the shell over theupper portion of the shell,

- substantially as and for the purpose specified.

3. The process of forming a lubricating device including-a cup, and a hollow stem depending from the cup, the process consisting in the'following steps: (1) forming a central opening in the bottom of a cup shaped shell of substantially the lengthof the finished cup, (2') passing the stem, which has a flange at its end, through the opening until the flange rests on the bottom of the shell, and (3) compressing the portion of 'the'shell above the flange to clamp the flange on'the bottom of the cup by placing the cup with the stem therein in a die which surrounds the lowcr portion of the cup, and forcing a reducing die of less diameter than the shell over the upper portion of the shell from the open end of the shell toward the closed end thereof, substantially as and for the purpose set forth.

4. The process of forming a lubricating device including a cup, and a hollow stem depending from the cup, the process consisting in the following steps: (1) forming a central opening in the bottom of a cup shaped shell of substantially the length of the finished cup, (2) passing the stem, which has a flange at its end, through the opening until the flange rests on the bottom of the shell, and (3) compressing the portion of the shell above the flange to clamp the flange on the bottom of the cup, by placing the cup with the stem therein in a die which surrounds the lowcr portion of the cup, and forcing a reducing die of less diameter than the shell over the upper portion of the shell, in a direction lengthwise of the shell from the open end of the shell toward the closed end thereof, and holding the shell at its end by a tool bearing on the edge of the shell, substantially as and for the purpose described.

5. The process of forming a lubricating device including a cup, and a hollow stem depending from the cup, the process consisting in the following steps :(l) reducing the diameter of the closed end of the cup shaped shell by forcing the shell into a reducing die and thereby thickening the reduced portion of the shell, (2) punching a hole in the closed end of the shell, (3) passing the stem, which has a flange at its upper end, through the hole until the flange engages the bottom of the shell, and (4-) compressing the portion of the shell above the reduced portion into a circle of less diameter than said reduced portion. substantially as and for the purpose specified.

6. The'process of forming a lubricating device including a cup, and a hollow stem depending from the cup, the process consisting in the following steps: (1) reducing the diameter of the closed end of the cup shaped shell of substantially the length of the tinished cup by forcing the shell into a reducing die by a tool bearing on the inner face of the closed end, and on the open end of the shell and thereby thickening the reduced portion of the shell, (2) punching a hole in the closed end of the shell, (3)-passing the stem havin a flange at its upper end, through 18%1018 until the flange engages the bottom of the shell and (4) compressing the portion of the shell above the reduced portion into a circle of less diameter than said reduced portion, substantially as and for the purpose set, forth.

7. The process of forming a lubricating device including a cup, and a hollow stem depending from the cup, the process consists ing in the following steps: (1) reducing the diameter of the closed end of a cup shaped shell of substantially the length of the finished cup by forcing the shell into a reducing die by a tool bearing on the inner face of the closed end, and, on the open end of the shell, (2) punching a hole in the closed end ofthe shell, (3) passing the stemwhich has a flange at its upper end,

5 through the hole until the flange engages the bottom of the shell, (4) compressing the portion of the shell above the reduced por: tion into a circle of less diameter than said reduced portion by placing the shell with the stem therein in a (118 fitting said reduced portion and forcing a reducing die overJ-the portion of the shell located out oi the forming die, the reducin die moving lengthwise of the shell from tie open'end of the shell to Ward the closed end thereof and (5) holding the shell from elongation by a tool on the open endof the shell, substantially as and for the purpose described.

' 8.-The process of forming a lubricating 2e device including a cup, and a hollow stem dependingfrom the cup, the process consisting in the following steps: (1 forming the 'base portion of a cup shaped s I ell adjoining the closed end thereof hexagonal by drawing and pushing the shell into a die having a reduced portion at its inner end (2) punch-- ing a hole in' the closed end of the shell, (3) passing the stem, with an hexagonal flange at its end, through the opening until the flange fits Within the hexagonal base of the shell and l) compressing the portion of the shell above the hexagonal base into a circle of less diameter than the base, substantially as and for the purpose specified.

9. The process, of forming a lubricating device including a cup, and a hollow stein depending from the cup, the process consisting in the followings steps: (1 forming closed end of a cup shaped shell substantially the length of the finished cup by drawing and pushing the shell into a die having a reduced. portion at. its inner end, (2) punching a hole in the closed end of the shell, (3) passing the stem, with an hexagonal flange at its end, through the opening until the hexagonal, the base portion EtClJOIIllllg the flange fits within the hexagonal base of the shell, (44) compressing the portion of the shell above the hexagonal base into a circle of'lessidiameter than the base by placing the-cup with the stem thereinv into a die inclosing the base portion of the shell, and forcing a reducing die over the ortionof the shell above the base, the reucing die moving from the open-end of the shell to- Ward t e base thereof and (5) holding the 

